Projects Page 2012-2013

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  7. Step 2 Variables and Hypotheses
  8. Step 3 Design Your Experiment
  9. Step 4 Plan your experiment
  10. Step 5 Do your experiment
  11. Step 6 Background
  12. Step 7 Analyze Your Data
  13. Step 8 What does it mean?
  14. Step 9 Prepare for Presentation
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Projects 2011-2012

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Kennett Middle School
Josiah Bartlett School

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shab-tem2

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Problem Scenario



Broad Question

what is the effect of the nutrents on spirodela growth

Specific Question

does the the nutrients effect the growth of spirodela

Hypothesis

I think it will double the growth


Graph of Hypothesis





Variables

Independent Variable:

amount of nutrients

Dependent Variable:

growth

Variables That Need To Be Controlled:

water, sunlight , temperature

Vocabulary List That Needs Explanation


General Plan

I am going to grow spirodelia in four different containers. The four different containers will have different amounts of nutrients. They all will have the same amount of water.

Potential Problems And solutions

Some of the spirodela will not grow in time and some wont grow at all.
There might not be any sunlight
The temperature might be inconsistent
I will put them in the same spot

Safety Or Environment

water will go on the floor and i will fall on my face

Experimental Design

(add the correct headings from the experimental design page before beginning)

Resources and Budget Table


Data Table

Time Line


Background Research

Phytoremediation of Cr(VI) by Spirodela polyrrhiza in binary combinations with low molecular weight organic compounds (LMWOCs) with a reducing or chelating potential, viz., ascorbic acid, citric acid, tartaric acid, oxalic acid, lactic acid, and glycerol was studied in Cr(VI) containing hydroponic media. Significant increase in the relative dry weight of plants with respect to Cr(VI) treated controls was observed with ascorbic acid and glycerol. The uptake of chromium by S. polyrrhiza followed Michaelis-Menten kinetics of active ion uptake. Interaction between Cr and ascorbic acid, oxalic acid, and lactic acid decreased Cr uptake, whereas citric acid, glycerol, and tartaric acid increased it. Supplementation of LMWOCs to Cr(VI) containing media decreased the MDA content of the plants. Multiple regression models revealed that LMWOCs decrease lipid peroxidation independently, as well as that induced by Cr(VI). It was found that superoxide dismutase (SOD), guaiacol peroxidase (GPX), and catalase (CAT) activities were increased significantly in plants growing in media containing Cr(VI). The study established that lactic acid, citric acid, ascorbic acid, and glycerol were most effective in increasing the Cr(VI) phytoremediating potential of S. polyrrhiza and LMWOCs with reducing or chelating properties decrease Cr(VI) stress in S. polyrrhiza.

References



Detailed Procedure


Diagram


Photo List



Results

All Raw Data


Graphs





Photos


Data Analysis


Conclusion

Discussion


Benefit to Community and/or Science



Abstract

the amount of nutreints does not effect the ammount of

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